diff options
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_devfreq.c')
-rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.c | 124 |
1 files changed, 35 insertions, 89 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 12ff77dacc95..4c4e8a30a1ac 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -13,97 +13,42 @@ #include "panfrost_gpu.h" #include "panfrost_regs.h" -static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev, int slot); +static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev); static int panfrost_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) { - struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); - struct dev_pm_opp *opp; - unsigned long old_clk_rate = pfdev->devfreq.cur_freq; - unsigned long target_volt, target_rate; + struct panfrost_device *pfdev = dev_get_drvdata(dev); int err; - opp = devfreq_recommended_opp(dev, freq, flags); - if (IS_ERR(opp)) - return PTR_ERR(opp); - - target_rate = dev_pm_opp_get_freq(opp); - target_volt = dev_pm_opp_get_voltage(opp); - dev_pm_opp_put(opp); - - if (old_clk_rate == target_rate) - return 0; - - /* - * If frequency scaling from low to high, adjust voltage first. - * If frequency scaling from high to low, adjust frequency first. - */ - if (old_clk_rate < target_rate) { - err = regulator_set_voltage(pfdev->regulator, target_volt, - target_volt); - if (err) { - dev_err(dev, "Cannot set voltage %lu uV\n", - target_volt); - return err; - } - } - - err = clk_set_rate(pfdev->clock, target_rate); - if (err) { - dev_err(dev, "Cannot set frequency %lu (%d)\n", target_rate, - err); - regulator_set_voltage(pfdev->regulator, pfdev->devfreq.cur_volt, - pfdev->devfreq.cur_volt); + err = dev_pm_opp_set_rate(dev, *freq); + if (err) return err; - } - if (old_clk_rate > target_rate) { - err = regulator_set_voltage(pfdev->regulator, target_volt, - target_volt); - if (err) - dev_err(dev, "Cannot set voltage %lu uV\n", target_volt); - } - - pfdev->devfreq.cur_freq = target_rate; - pfdev->devfreq.cur_volt = target_volt; + *freq = clk_get_rate(pfdev->clock); return 0; } static void panfrost_devfreq_reset(struct panfrost_device *pfdev) { - ktime_t now = ktime_get(); - int i; - - for (i = 0; i < NUM_JOB_SLOTS; i++) { - pfdev->devfreq.slot[i].busy_time = 0; - pfdev->devfreq.slot[i].idle_time = 0; - pfdev->devfreq.slot[i].time_last_update = now; - } + pfdev->devfreq.busy_time = 0; + pfdev->devfreq.idle_time = 0; + pfdev->devfreq.time_last_update = ktime_get(); } static int panfrost_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *status) { - struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); - int i; + struct panfrost_device *pfdev = dev_get_drvdata(dev); - for (i = 0; i < NUM_JOB_SLOTS; i++) { - panfrost_devfreq_update_utilization(pfdev, i); - } + panfrost_devfreq_update_utilization(pfdev); status->current_frequency = clk_get_rate(pfdev->clock); - status->total_time = ktime_to_ns(ktime_add(pfdev->devfreq.slot[0].busy_time, - pfdev->devfreq.slot[0].idle_time)); + status->total_time = ktime_to_ns(ktime_add(pfdev->devfreq.busy_time, + pfdev->devfreq.idle_time)); - status->busy_time = 0; - for (i = 0; i < NUM_JOB_SLOTS; i++) { - status->busy_time += ktime_to_ns(pfdev->devfreq.slot[i].busy_time); - } - - /* We're scheduling only to one core atm, so don't divide for now */ - /* status->busy_time /= NUM_JOB_SLOTS; */ + status->busy_time = ktime_to_ns(pfdev->devfreq.busy_time); panfrost_devfreq_reset(pfdev); @@ -119,7 +64,7 @@ static int panfrost_devfreq_get_cur_freq(struct device *dev, unsigned long *freq { struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); - *freq = pfdev->devfreq.cur_freq; + *freq = clk_get_rate(pfdev->clock); return 0; } @@ -135,6 +80,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) { int ret; struct dev_pm_opp *opp; + unsigned long cur_freq; ret = dev_pm_opp_of_add_table(&pfdev->pdev->dev); if (ret == -ENODEV) /* Optional, continue without devfreq */ @@ -144,13 +90,13 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) panfrost_devfreq_reset(pfdev); - pfdev->devfreq.cur_freq = clk_get_rate(pfdev->clock); + cur_freq = clk_get_rate(pfdev->clock); - opp = devfreq_recommended_opp(&pfdev->pdev->dev, &pfdev->devfreq.cur_freq, 0); + opp = devfreq_recommended_opp(&pfdev->pdev->dev, &cur_freq, 0); if (IS_ERR(opp)) return PTR_ERR(opp); - panfrost_devfreq_profile.initial_freq = pfdev->devfreq.cur_freq; + panfrost_devfreq_profile.initial_freq = cur_freq; dev_pm_opp_put(opp); pfdev->devfreq.devfreq = devm_devfreq_add_device(&pfdev->pdev->dev, @@ -174,14 +120,10 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev) void panfrost_devfreq_resume(struct panfrost_device *pfdev) { - int i; - if (!pfdev->devfreq.devfreq) return; panfrost_devfreq_reset(pfdev); - for (i = 0; i < NUM_JOB_SLOTS; i++) - pfdev->devfreq.slot[i].busy = false; devfreq_resume_device(pfdev->devfreq.devfreq); } @@ -194,9 +136,8 @@ void panfrost_devfreq_suspend(struct panfrost_device *pfdev) devfreq_suspend_device(pfdev->devfreq.devfreq); } -static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev, int slot) +static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev) { - struct panfrost_devfreq_slot *devfreq_slot = &pfdev->devfreq.slot[slot]; ktime_t now; ktime_t last; @@ -204,22 +145,27 @@ static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev, i return; now = ktime_get(); - last = pfdev->devfreq.slot[slot].time_last_update; + last = pfdev->devfreq.time_last_update; - /* If we last recorded a transition to busy, we have been idle since */ - if (devfreq_slot->busy) - pfdev->devfreq.slot[slot].busy_time += ktime_sub(now, last); + if (atomic_read(&pfdev->devfreq.busy_count) > 0) + pfdev->devfreq.busy_time += ktime_sub(now, last); else - pfdev->devfreq.slot[slot].idle_time += ktime_sub(now, last); + pfdev->devfreq.idle_time += ktime_sub(now, last); - pfdev->devfreq.slot[slot].time_last_update = now; + pfdev->devfreq.time_last_update = now; +} + +void panfrost_devfreq_record_busy(struct panfrost_device *pfdev) +{ + panfrost_devfreq_update_utilization(pfdev); + atomic_inc(&pfdev->devfreq.busy_count); } -/* The job scheduler is expected to call this at every transition busy <-> idle */ -void panfrost_devfreq_record_transition(struct panfrost_device *pfdev, int slot) +void panfrost_devfreq_record_idle(struct panfrost_device *pfdev) { - struct panfrost_devfreq_slot *devfreq_slot = &pfdev->devfreq.slot[slot]; + int count; - panfrost_devfreq_update_utilization(pfdev, slot); - devfreq_slot->busy = !devfreq_slot->busy; + panfrost_devfreq_update_utilization(pfdev); + count = atomic_dec_if_positive(&pfdev->devfreq.busy_count); + WARN_ON(count < 0); } |